Control unit



FIG. 1 is a front perspective view of a control unit showing my new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front elevation thereof;

FIG. 4 is a rear elevation thereof;

FIG. 5 is a right end elevation thereof;

FIG. 6 is a left end elevation thereof; and,

FIG. 7 is a top plan view thereof.

The broken lines that define the bounds of the claimed design form no part thereof. 

The ornamental design for a control unit, as shown and described. 